Bunsen burner



Patented Dec. 19, 1939 UNITED STATES PATENT 'OFFICE BUNSEN BURNER Application March 28, 1938, Serial No. 198,587

8 Claims.

This invention relates to improved constructions and operation of Bunsen burners and has been devised to provide automatic and manual control of the delivery of gas to the heating jet of the burner and means whereby this jet may be positioned in any direction in a horizontal plane and .in any direction in a vertical plane.

In the accompanying drawing which illustrates one form of the inventionl0 Fig. 1 is a part sectional elevation of an improved burner;

Fig. 2 is a plan of the same burner;

Fig. 3 is an enlarged side elevation of the valve;

Fig. 4 is a cross sectional elevation of the vertical delivery pipe and casing with locking pin.

The burner illustrated .has a base block I0 fitted with a horizontal gas supply pipe I I which is adapted to be detachably connected, as by a flexible tube, with the outlet side of a tap or cock in a gas main or other gas supply. A central vertical supply pipe I2 is tted into the base block in communication with supply pipe I I.

About pipe I2 is neatly fitted, for rotation about the pipe I2, a vertical gas delivery pipe I3 having a deiivery aperture It in its side wall. A casing i5, provided with a laterally extending tubular member I6, is tted loosely about the pipe i3 and is secured thereto by a pin so that the horizontal axis of the member It is in alignment with the delivery aperture I@ and retains this alignment when the pipe I3 is rotated about the pipe I2. At its outer end the member I6 is tted with a nozzle pipe Il which is adapted to be rotated by hand in a' vertical plane about the `3` horizontal aXis of the member I6. The nozzle end of pipe Il may thus be positioned by hand in any direction in a horizontal plane and also in any position in a vertical plane. Portions of the junction of member I 6 wit'h casing I5 are .i0 cut away to provide air inlet ports I8 so that gas issuing from the aperture I4 may be mixed with air before it enters the nozzle pipe I'l. These air ports may be controlled by means, such as a slidable sleeve, on member I5.

The casing I5 is provided to facilitate manufacture and assembly but may be dispensed with, the member IG in that case being secured directly to the delivery pipe I3.

A stem I9 is rotatable and is longitudinally slidable in the pipe I3, and it carries a valve on its inner end to control ow of gas through the aperture It to the member I@ and the nozzle pipe I'I.

In the form illustrated, the valve is formed integrally of the lower or inner portion of the stem. It includes an annular lower abutment 33, a collar 2i, and a collar 20, all spaced from one another and in close tting slidable contact with the pipe I3, and the collar 20 being spaced from the lower end of the stem proper. The 5 collars are formed by recessing, or by reducing the diameter of, the stem material between them and between the abutment 33 and the adjacent collar 2I and between the lower end of the stem proper and the collar 20, the reduced portion of 10 the stem constituting the valve body.

This formation affords a chamber 24 between the lower end of the stem proper and the collar 2B, a chamber 25 between the collars 2 and 2l, and a chamber 26 between the collar 2I and the 15 abutment 33, the pipe I3 constituting the peripheral or outer wall of the chambers.

The collar 20 is formed with a relatively large peripheral slot 22 affording communication between the chambers 24 and 25, and the collar 20 2I has a relatively small passage 23 affording communication between the chambers 25 and 26.

The valve stem in the neighborhood of the valve is provided with a central passage 2l and one or more lateral passages 23 so that gas may flow from the lower portion of delivery pipe I3 into the gas chamber 25 and thence either directly to the aperture Ill or by way of slit 23 and chamber 26 to the aperture I 4.

To facilitate reciprocating movements of the valve within the delivery pipe I3 so that either chamber 25 or chamber 26 may be placed in direct communication with the aperture ICI the upper end of the Valve stem I9 is fitted With a cap 23 and with a return spring 30. Hand pressure on the cap forces the valve to travel downwards and bring chamber 25 into direct communication with aperture It. A full delivery of gas from the delivery pipe I3 to the nozzle pipe 4o I'l is thus effected. On release of the downward pressure on the cap 29 the spring 30 effects upward movement of the valve in the delivery pipe and thereby brings chamber 26 into direct communication with the delivery aperture I4. 45 Gas entering chamber 25 from the delivery pipe I3 passes through the narrow slit 23 into chamber 26 in sujicient quantity to feed a pilot light at the nozzle 3l..

To retain the casing I5 and member I6 in 50 correct relation to the gas vdelivery pipe I3 and its aperture I4 holes are drilled in adjacent parts of the casing and pipe to receive a pin 32 (Figs 1 and 4). This pin is shown in Fig. 1 as projecting outwardly from the casing I5. It may 55 be cut off near to or ilush with the outer wall of the casing.

In the normal upper position of the valve and valve stem the inner end of the pin 32 lies below the slot 22 in the collar 2li, but when the valve stem is pressed down by hand the slot passes over the pin which now lies in the recess or housing 24. When the cap 29 is partially rotated and the downward pressure on the caplremoved the collar 20 is forced against the pin which prevents further upward movement of the valve and Valve stem and retains the gas chamber 25 in communication with the aperture I4. Full delivery of gas from the delivery pipe i3 to the nozzle 3l is thus effected until the collar 20 is releasedfrom the pin. Upward movement of the valve and valve stem by the spring 3l? then reduces the delivery of gas to that required for a pilot light.

I claim: l

1. A gas burner comprising a base, a gas supply pipe thereon, a gas delivery pipe rotatable around said supply pipe having a lateral delivery aperture, a laterally extending tubular member on said delivery pipe in communication with said aperture, and a valve slidable in said delivery pipe to control passage of gas therefrom through said aperture.

2. A gas burner comprising a base, a gas supply pipe thereon, a gas delivery pipe rotatable around said supply pipe having a lateral delivery aperture, and a valve slidable in said delivery pipe to control passage of gas therefrom through said aperture, said valve including two spaced collars in contact with the wall of said delivery pipe.

3. A gas burner comprising a base, a gas supply pipe thereon, a gas delivery pipe rotatable around said supply pipe having a lateral delivery aperture, a laterally extending tubular member on said delivery pipe in communication with said aperture, a nozzle rotatably mounted on said member, and a valve slidable in said delivery pipe to control passage of gas therefrom through said aperture.

4. A gas burner comprising a base, a gas supply pipe thereon, a gas delivery pipe rotatable around said supply pipe having a lateral delivery aperture, a valve and valve stem slidable in said delivery pipe to control passage of gas therefrom through said aperture, and a spring associated with said stem urging the same in one direction.

5. A gas burner comprising a base, a gas supply pipe thereon, a gas delivery pipe rotatable around said supply pipe having a lateral delivery aperture, a valve including spaced collars slidable in said delivery pipe to control passage of gas therefrom through said aperture, a Valve stem on which said valve is mounted, there being inside of said delivery pipe a gas chamber between said collars in communication with said aperture in one position of said valve, and a spring associated with said valve stem urging said chamber out of communication with said aperture.

6. A gas burner comprising a base, a gas supply pipe thereon, a gas delivery pipe rotatable around said supply'pipe having a lateral delivery aperture, a valve including spaced collars slidable in said delivery pipe to control passage of gas therefrom through said aperture, a valve stem on which said valve is mounted, there being inside of said delivery pipe a gas chamber between said colars in communication with said aperture in one position of said valve, and a pin projecting inwardly of said delivery pipe limiting sliding movement of said valve.

'7. A gas burner comprising a base, a gas supply pipe thereon, a gas delivery pipe over said supply pipe having a lateral delivery aperture, a valve including a body and spaced collars thereon slidable in said delivery pipe to control passage of gas therefrom through said aperture, and a valve stern on which said valve is end mounted, there being inside of said delivery pipe a gas chamber between said collars and an end gas chamber, one of said collars having a passage aording communication between said two gas chambers, and there being a passage from the free end of said Valve body to the gas chamber between said collars.

8. In a gas burner, a delivery pipe having a lateral delivery aperture, a supply pipe in communication with said delivery pipe, a Valve stem closely fitting and slidable and rotatable in said delivery pipe, and a spring urging said stem in one direction; a valve on the inner end of said stem normally' positioned at said aperture and comprising a body of less diameter than said stem, an annular abutment on said body, a collar on said body adjacent to and spaced from said abutment, a collar on said body adjacent to and spaced from the inner end of the stern proper and having a peripheral slot, said abutment and collars contacting the wall of said delivery pipe, there being a passage in said body extending from its free end and communicating with the space between said collars and a small passage extending through said collar adjacent to said abutment near its periphery; and a pin projecting into said delivery pipe cooperating with said collar having a peripheral slot to limit sliding movement of said stem under urge of said spring, said slot permitting that collar to pass said pin.

ROY CORNISH UNDERWOOD. 

